function layer_show(title, url, w, h) {
	if (title == null || title == '') {
		title = false;
	}
	;
	if (url == null || url == '') {
		url = "404.html";
	}
	;
	if (w == null || w == '') {
		w = 800;
	}
	;
	if (h == null || h == '') {
		h = ($(window).height() - 50);
	}
	;
	layer.open({
		type : 2,
		area : [ w + 'px', h + 'px' ],
		fix : false, // 不固定
		maxmin : true,
		shade : 0.4,
		title : title,
		content : url
	});
}
/* 关闭弹出框口 */
function layer_close() {
	var index = parent.layer.getFrameIndex(window.name);
	parent.layer.close(index);
}